Air Quality Sensor
Last updated
Last updated
This device measures VOC, NOx, CO2, PM (Particulate Matter), relative humidity, and temperature. It transmits data using Modbus RTU communication protocol over the RS-485 standard.
The following table outlines the capabilities of the device.
Onboard sensors
Sensirion SEN55 Environmental Sensor Sensirion SCD41 CO2 Sensor Optional accelerometer for 2-axis angle detection
Memory
Historical data for internal statistics Configuration and calibration storage
Microcontroller
STM32 C0 Series MCU, 32-bit ARM Cortex-M0+
The following table shows sensor characteristics.
VOC Index
<±15 VOC Index points or % VOC Index m.v. (the larger)
1
500
NOx Index
<±15 NOx Index points or % NOx Index m.v. (the larger)
1
500
Relative Humidity
@ 25 °C, 30-70 %RH: ±4.5% rH (typical), ±6% rH (maximum)
Temperature
@ 15-30 °C, 50 %RH: ±0.45°C (typical), ±0.7°C (maximum)
PM 1.0
0 to 100 μg/m3: ±[5 μg/m3 + 5 % m.v.] 100 to 1000 μg/m3: ±10 % m.v.
N/A
N/A
PM 2.5
0 to 100 μg/m3: ±[5 μg/m3 + 5 % m.v.] 100 to 1000 μg/m3: ±10 % m.v.
N/A
N/A
PM 4.0
0 to 100 μg/m3: ±25 μg/m3 100 to 1000 μg/m3: ±25 % m.v.
N/A
N/A
PM 10
0 to 100 μg/m3: ±25 μg/m3 100 to 1000 μg/m3: ±25 % m.v.
N/A
N/A
CO2
400 ppm ... 1000 ppm ±(50 ppm + 2.5% of reading) 1001 ppm ... 2000 ppm ±(50 ppm + 3% of reading) 2001 ppm ... 5000 ppm ±(40 ppm + 5% of reading)
400 ppm
5000 ppm
This table shows the mechanical properties of the device.
Mounting Style
Screw Mount
Dimensions
80w x 60h x 35d mm
Base Material
ASA (Acrylonitrile Styrene Acrylate) Impact, wear, and UV resistant
Weight
< 200g
Environmental Conditions refer to the physical and atmospheric conditions surrounding the device.
Operating Ambient Temperature
10°C…+40°C
Relative Humidity
20%...80% RH
Storage
-20°C…+60°C
10%…90% RH (non-condensing)
This table indicates the electrical specifications of the device.
Main Supply
DC 5…24V
RS-485
-7…+12V (No internal termination)
Internal Fuse
DC 60V 6A 1206 Case Slow-burning
Absolute maximum ratings indicate the maximum electrical or environmental parameters this device can withstand without damage.
Stresses above the absolute maximum ratings listed in the table may cause permanent damage to the device. These are stress ratings only, and the functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
Operating Ambient Temperature
-10°C…+50°C
Relative Humidity
0%...90% RH (non-condensing)
Main Supply
DC 30V
RS-485
-7…+12V
This table lists the communication options of the device.
RS-485
4-Pin connectivity (Power, GND, RS-485 A, RS-485 B)
This device supports the following communication protocols.
